Ninth Skill Checker-kun has begun.

You have 11 turns. Elemental advantage only. Debuffs apply, except for things that prevent Skill Checker-kun from taking turns (Charm, Para, you know). Rages and Stuns quickly. Every turn you get hit by a Trigger:

It loops by doing small, medium, high damage. With the third one applying Atk Up (which I assume cannot be Dispelled). Without debuffs, about:
Turn 01: 3x250 (750)
Turn 02: 3x350 (1050)
Turn 03: 5x700 (3500)
Turn 04: 3x1200 (3600)
Turn 05: 3x1800 (5400)
Turn 06: 5x3500 (17500)
Turn 07: 3x2200 (6600)
Turn 08: 3x3200 (9600)
Turn 09: 5x6200 (31000)
Turn 10: 3x3200 (9600)
Turn 11: Damage you take on this turn doesn't matter.

That's a total of 88600 damage. There are two catches though: damage is extremely likely to hit the front row only, and back row takes way less damage (50-75% reduction, unsure). In other words, you have two tactics available to you: killing front rowers on purpose, or using Guard from back row to mitigate damage significantly.

The DMM wiki seems to also be talking about Intercept, but I couldn't make that happen. If Intercept does work, I assume that Arianrod (2/5 uptime), Shamash (3/6 uptime), Berith (3/5 uptime) and Erebus (3/6+ uptime) would be handy.

And finally, to be noted is that this Skill Checker-kun has high Def. This means three things:
1. You will be doing 62.5% damage compared to normal. Since you were doing 150% damage to last Skill Checker-kun, the numbers may feel very low this time (between half and one-third).
2. Ability damage which is basically always capped against normal def might feel more useful now. However, Full Bursts are still where the damage is at.
3. Extreme whales will pull higher numbers compared to you this time around. Since if you barely hit cap and they hit for 10% more damage, it means that they actually have twice your power. Now that the pure power required to hit cap is way higher, their numbers will be far bigger than yours.

Ultimately, whoever has the most MLB Northern Stars will win though. Good luck, have fun~